ABACUS is a very flexible and powerful spreadsheet. Due to the consequent integration into GEM, ABACUS runs on all TOS-compatible computers (incl. MultiTOS/MagiC and also MagicMAC) and supports all resolutions from 640 * 400 (monochrome or color, also graphic cards). Predefined constants, very flexible block operations via the clipboard (cut/copy/paste), user definable row/column headers, reloadable printer drivers, recursive calculation, numerous import/export formats (e.g. import of GEMCALC-files and DIF, export as ASCII-file and DIF), cell protection and much more. For graphic output the data can easily be transferred to an external graphic program (e.g. SciGraph).